In a nutshell, almost everything ordinary Americans think they know about the Bill of Rights, including the phrase 'Bill of Rights,' comes from the Reconstruction period. Not once did the Founders refer to these early amendments as a bill of rights. We read everything through the prism of the 14th amendment -- including the right to bear and keep arms.

The Fourteenth Amendment has a lot of parts, among them the definition of citizenship, Civil War debt, due process, and equal protection. Amar wrote more about the interplay between the 2nd and 14th Amendments for Slate in 2008.

But the 14th Amendment did not specifically enumerate these sacred privileges and immunities. Instead, like the Ninth, the 14th invited interpreters to pay close attention to fundamental rights that Americans had affirmed through their lived experience-in state bills of rights and in other canonical texts such as the Declaration of Independence and landmark civil rights legislation. And when it came to guns, a companion statute to the 14th Amendment, enacted by Congress in 1866, declared that "laws ... concerning personal liberty [and] personal security ... including the constitutional right to bear arms, shall be secured to and enjoyed by all the citizens." Here, in sharp contrast to founding-era legal texts, the "bear arms" phrase was decisively severed from the military context. Women as well as men could claim a "personal" right to protect their "personal liberty" and "personal security" in their homes. The Reconstruction-era Congress clearly understood that Southern blacks might need guns in their homes to protect themselves from private violence in places where they could not rely on local constables to keep their neighborhoods safe. When guns were outlawed, only outlaw Klansmen would have guns, to paraphrase a modern NRA slogan. In this critical chapter in the history of American liberty, we find additional evidence of an individual right to have a gun in one's home, regardless of the original meaning of the Second Amendment.